20858852502 has 24 divisors (see below), whose sum is σ = 45206898984. Its totient is φ = 6950994144.

The previous prime is 20858852477. The next prime is 20858852561. The reversal of 20858852502 is 20525885802.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96588 + ... + 225935.

It is an arithmetic number, because the mean of its divisors is an integer number (1883620791).

Almost surely, 2^20858852502 is an apocalyptic number.

20858852502 is an abundant number, since it is smaller than the sum of its proper divisors (24348046482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20858852502 is a wasteful number, since it uses less digits than its factorization.

20858852502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326124 (or 326121 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 45.

The spelling of 20858852502 in words is "twenty billion, eight hundred fifty-eight million, eight hundred fifty-two thousand, five hundred two".